Water heater



June 19, 1928.

1,674,295 J. P. PERASS WATER HEATER Filed March 10, 1927 S-mvemtoz V John maw @5 {do Silica mug Patented dune 1.9, 192%.

Uhlil hfi FFAFES JOHN P. PERASS, OF GLEN ROCK, NEXV JERSEY.

- WATER HEATER.

Application filed. March 10, 1927. Serial No. 174,113.

This invention relates to improvements in water heaters, the principal object of the in-. vention being to provide a system whereby the excess heat from a furnace which is usua ally carried up the chimney and wasted is made use of to maintain a continuous supply of hot water while the furnace is inoperation.

A. further object of the invention is to 1 i provide -a water heater in which not only is the waste heat of the furnace utilized to the best advantage, but provision is made for independently heating the same system by ineans of a gas burner.

1th the foregoing and other objects in View. which will appear as the description proceeds, the invention consists in the novel features of construction and combination of parts which will be more fully described hereinafter and particularly pointed out in the claims.

In the drawing accompanying and forming part of this specification,

Fig. 1 is a partly sectional plan view, with parts broken away, of a device embodying a preferred form of my invention;

Fig. 2 is a side elevation of said device, also with parts broken away and shown in section, the device being shown in this figure provided with independent heating means; and I Fig. 3 is a transverse sectional view, taken on the line 33 of Fig. 2; i

Similar characters of reference designate the same parts in the different figures of the drawing.

Referring to the drawing, 1 designates a tubular housing, said housing being adapted to form a secton of the usual flue that con nects a furnace to the Smokestack and which serves to lead away the gases of combustion, excess heat. etc. It is the principal object of my invention to utilize a large part of this excess heat, which would otherwise pass up the chimney and be thus entirely wasted, for furnishing a constant supply of hot water so long as the furnace is in operation. To this end, as shown in Figs. 1 to 3, I have provided a series of tubes 2 bent into semicircular form and each having a straight portion 3 at each end thereof. The tubes 2 are preferably mounted within the flue 1 in spaced and staggered relation; that is to say, one tube is set with its curvature extending in one direction and the next tube with its curvature in the opposite direction.v The straight ends of the tubes pass through diametrically opposite perforations in the wall. of the flue, the straight portion atone end of each tube being secured in communication with a manifold 4 connected with a suitable source of water supply (not shown), while the straight portions at the opposite ends of the tubes are in communication with a manifold 5 which may be connected to a suitable reservoir (not shown) forstoring the heated water. It will readily be seen that with this construction when the furnace is in operation the water contained in the tubes 2 will. quickly become heated and move upwards into the manifold 5'thereby imparting heat to the water insaid manifold, which in turn will deliver it to the reservoir for use as desired. In this manner theeX- cess heat developed. from the fuel consumed in the furnace, and which heat is usually entirely lost, is made to serve a useful purpose. The fine 1 is preferably divided longitudinally along a plane passing centrally ,through'the perforations throughwhioh the ends 3 of the tubes pass, as indicated by the line 1"? in Fig. 1, so that said flue can readily be detached for cleaning or replacement, suitable means being provided for holding the two parts together, such means being shown in Fig. 2 in the form of perforated lugs 1 adapted to be bolted together, although any other preferred means may be provided.

In connection with the heating device above described, I have also provided means for heating the water by means of gas when the furnace is not in operation. As shown in Figs. 2 and 3, a tubular housing 6 is provided which encloses that portion-of the supply manifold 4 in which the ends of the tubes 2 are secured, said housing being provided in its side and end walls with open-- ings 7 and 8 for permitting circulation of air. One portion of the side wall, as 6, is hingedly secured at. one edge thereof to the other portion to provide a door which may be opened to the position shown in full lines in Fig. 3 to permit lighting and clean-- ing of the device, said door being adapted to be closed as indicated in dotted lines in Fig. 3 for retaining heat, the door being pro-- vided with a suitable rotatable latch 9 for maintaining it in closed position. The housing 6 may be supported in any desired As shown herein it is supported by its end walls on the manifold 4 and also I by brackets riveted to the housing and to the flue l. A gas tube 11 passes into the housing 6 through one end tl'iereol. and is supported therein by brackets 12 depending from the manifold 4, one near each end of the housing 6, said gas pipe having a cap 13 closing the end thereof within the housing and provided at its opposite end with the usual. valved connection 14; for regulating the flow of gas. A plurality of perforations 15 are formed along the upper portion of the pipe within the housing Ifor permitting the gas to escape and be ignited in the usual manner. v

While I have described in detail the forms of the device herein illustrated it is to be understood that I do not intend thereby to limit my invention to the precise features of construction shown, as I an'i aware that many mechanical modifications may be made therein without departing from the spirit and scope of the invention as set forth in the appended claims.

Having thus described myinvention, What I claim is: I

1. A water heater, comprising in combination, the smoke flue of av furnace, a series of single longitudinally semicircular tubes disposed within said flue and llElVil'lg their opposite ends extending through the wall of the flue at diametrically opposite points,

a Water-supply manifold in communication with the ends of all of said tubes at one side of the flue, and a Water-receiving manifold in communication with the opposite ends of all of the tubes.

2. A water heater, comprising in combination, the smoke flue of a furnace, a series of single longitudinally semicircular tubes disposed within said flue and each projecting at its opposite ends through the wall of the flue'at diametrically opposite points, the curvature of alternate tubes extending parallel with opposite sides of the wall of the flue, a source of water supply communicatin With all of said tubes at one side oi? the flue, and a delivery system communicating with the tubes at the opposite side oiv said flue.

3. A Water-heater, comprising, in combination, the smoke flue ot' a furnace, and a series of tubes disposed within said flue, 

